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Helen Birmingham very kindly send me a mixed box of random things. Amongst the items inside the vintage tea sample box were a fossilised sharks tooth, and an old microscope slide.The slide was prepared in 1881 and shows the uterine glands of a Guinea Pig. The shark tooth is probably from Morocco and as a sharks skeleton is made of cartilage, only the teeth and vertebrae become fossils. This is likely to be 30-50 million years old.When I was a child, these would have been some of my most favourite things. I used to spend countless hours wandering beaches and quarries looking for fossils, and amassed quite a nice collection.I also had a small microscope and enjoyed the fiddly process of mounting specimens.As a child, I guess I was quite a nerd.Some might say that I still am.